A look at formal fashion as worn by celebrities attending the Academy Awards over the past 50 years.
Colin Firth looked immaculate in an eco-friendly suit by Tom Ford in 2011 Oscars when he took home the Best Actor award for 'The King's Speech'. (Getty Images)

Heath Ledger looked immaculate with a lapel pin that sparkled on the suit much like his to-die-for smile in 2005 when he was nominated for Best Actor for his role in 'Brokeback Mountain'.
(Getty Images)

Experimenting a little with the self-tied bow tie, Marlon Brando added subtlety to his suit by pairing his shawl-collar tuxedo with a skinny bow tie. The shutterbugs could not have enough of Brando who clinched the Oscar for his powerful role in 'On the Waterfront' in 1954.
(Getty Images)

Humphrey Bogart's wide peak lapel, self-tied bow tie, and white pocket square with black piping, which he wore at the 1951 Academy Awards created a fashion statement which still rules the roost among the men strutting down the red carpet of the Oscars.
(Getty Images)